Contents

On 18 May 1863, Heinemann was born in Surbiton, Surrey, England.[1] Heinemann's father Louis Heinemann, a director of Parr's Bank and a native of Hanover, Germany. Heinemann's mother was Jane Lavino.[2] Both his parents were Jewish by descent, although they had been Anglican for two generations.[2] In his early life he wanted to be a musician, either as a performer or a composer, but, realising that he lacked the ability to be successful in that field.

On 2 February 1899, Heinemann married Magda Stuart Sindici, a writer who used the pseudonym Kassandra Vivaria, at St. Antonio's Church in Anzio, Italy. Her father was Augusto Sindici, an Italian poet. Her mother was Francesca Stuart Sindici, a Spanish-Italian painter.[3] Wedding guest included James Abbott McNeill Whistler, a painter. Whistler attended their wedding as the bestman and painted the bride's portrait in 1900. In 1904, Heinemann divorced his wife.[3][4]
On 5 October 1920, Heinemann died unexpectedly in London, England.[5][1] Heinemann had no children and his presumptive heir, his nephew John Heinemann, had died in the First World War. Heinemann's share of the company was bought out by Frank Nelson Doubleday, the New York publisher.[2]